钒在钠系渣和碳饱和铁水中的化学行为
文献类型：学位论文
| 作者 | 朱胜友 |
| 学位类别 | 硕士 |
| 答辩日期 | 1989-06-30 |
| 授予单位 | 中国科学院研究生院 |
| 导师 | 曹洪文 |
| 中文摘要 | 本文在高温下研究了金属钒在碳饱和含钒铁水和Na_2 O-SiO_2渣系及Na_2 O-SiO_2 -M_xO_y(M_xO_y:FeO、Al_2O_3、TiO_2、CaO)渣系的平衡分配比。试验结果表明，提高渣碱度、降低实验温度和添加氧化剂(Fe_2 O_3)有利于脱钒；而添加Al_2O_3、TiO_2不利于脱钒。与Na_2 O比较，CaO的脱钒能力不及Na_2 O。本文也研究了用Na_2 O-SiO_2熔渣和Na_2 O-SiO_2-FeO熔渣进行脱钒的动力学。发现在两种渣系中初期脱钒反应都可按一级反应进行分析和处理，脱钒反应的表观活化能为：E = 12.46Kcal/mol。在反应初期，对于高碱度Na_2O-SiO_2熔渣，脱钒反应的控制步骤是氧通过渣相的供给过程可能性大；对于低碱度Na_2O-SiO_2熔渣，脱钒反应的控制步骤是钒从铁－渣界面向渣中的扩散过程可能性大。使用Na_2O-SiO_2-FeO熔渣，初期脱钒反应的控制步骤可能是钒从铁－渣界面向渣中的扩散过程。 |
| 英文摘要 | Vanadium equilibrium distribution ratios have been determined between fluxes of the Na_2O-SiO_2 and/or Na_2O-SiO_2-M_xO_y (M_xO_y: FeO, Al_2O_3, TiO_2 CaO) systems and carbon saturated liquid iron at hot metal temperatures. It has been found that higher slag basicity、lower treatment temperature and adding Fe_2O_3 would be favorable for vanadium removal, whereas adding Al_2O_3, TiO_2 into fluxes, respectively, would not. Compared with Na_2O, the vanadium removal ability of CaO was much lower. The kinetics of vanadium removal of cabon saturated liquid iron by Na_2O-based flux was also investigated. The results showed that the rate of initial stage vanadium removal reaction was analysed on the assumption that the reaction was first order. The apparent activation energy of the reaction obtained was 12.46Kcal/mol for Na_2O-SiO_2 flux. The diffusion of vanadium form slag-liquid iron interface to slag phase was considered as the rate-determining step in the initial stage of vanadium removal by Na_2O-SiO_2-FeO flux and/or Na_2O-SiO_2 flux containing more Na_2O; It was possible that the rate-determining step was the supply of oxygen form slag phase to slag-liquid iron interface in initial stage vanadium removal by Na_zO-SiO_2 flux at slag basicity below 1.0. |
| 语种 | 中文 |
| 公开日期 | 2014-07-03 |
| 页码 | 49 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/8392]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 推荐引用方式 GB/T 7714 | 朱胜友. 钒在钠系渣和碳饱和铁水中的化学行为[D]. 中国科学院研究生院. 1989. |
入库方式： OAI收割
来源：过程工程研究所
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